Nope, on a wbxer ... rocker cover off, rocker shaft assy. off (making note of what goes where), relevant pushrod out, pushrod tube cover off, destroy relevant tube, fit telescopic tube and seals, re-assemble.
Ian
The Hulley's Bus 1989 2.1DJ Trampspotter LPG courtesy of Steve @ Gasure
I got my garage to do the push rod tubes as they had swapped the engine over for me ...
Not sure how easy it was but they sorted it and charged me 2 hours labour!
Remove rocker covers, remove old tubes, insert new tubes, some amount of resetting....sorry I cant help more....I think there are fitting instructions from the Coolair website and in VW Transporter Haynes & Workshop manual..........